When a trash widget is on desktop, I can not open it with double-click or single click (when setting to open with single click).

If I lock the widget, this feature works well.  Both double and single click work to open trashcan.
I can also open it with right-click and choose "Open".

I'm using Kubuntu 12.04 and upgrade KDE to 4.11.2, and another box running Kubuntu 13.04 and upgrade to 4.10.5.  They both have this problem, but it looks that other people have this problem too.


Reproducible: Always

Steps to Reproduce:
1. Add a trash can widget in desktop plasma.
2. double-click it to open
3.
Actual Results:  
Not opened.

Expected Results:  
It should open with double-click.

If I lock the widget, this feature works well.  Both double and single click work to open trashcan.
I can also open it with right-click and choose "Open".